v2.4.0.8

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2013
Mr. and Ms. Thomas [Member] |
Related Party Transaction [Line Items] |
Cash payments remained to be paid | $ 1.0
Mr. Thomas [Member] |
Related Party Transaction [Line Items] |
Cash payouts to be made under separation agreements | 0.8
Ms. Thomas [Member] |
Related Party Transaction [Line Items] |
Cash payouts to be made under separation agreements | $ 0.4

X
- Definition Cash payments remained to be paid as of the balance sheet date. + References No definition available. + Details
Name: | epax_CashPaymentsRemainedToBePaid
Namespace Prefix: | epax_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash payouts to be made under the terms of separation agreements. + References No definition available. + Details
Name: | epax_CashPayoutsUnderSeparationAgreements
Namespace Prefix: | epax_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration